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500 MILLION YEARS AGO
500 MILLION YEARS AGO
ABOUT THE GED WRITING EXAM6 DOC
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3,500 million years ago: origin of first living cellsPaleozoic Age 590–248 million years agoAlgae, invertebrates, fish, fungi, plants, insects, first amphibians andreptiles, conifers
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ABOUT THE GED WRITING EXAM6 DOC